Fix /dev/random problem: add initial value for status in waitpid()

It seems that if there's no child process terminated, waitpid won't set status.
This will cause problem when status=0 initially, which is the case on the server
Also explains why everything is ok locally, where initail value of status is some random number
1 file changed
tree: 491fd67588a8cdc7424e625f0fa86bf23b79c79d
  1. dispatcher-v2/
  2. judger-v2/
  3. .gitignore